Anya recorded the temperatures of four different smooth materials after they were placed under a heat lamp for thirty minutes.
| Material | Temperature (°F) |
|----------|--------------------|
| W | 87 |
| X | 99 |
| Y | 75 |
| Z | 105 |
Which conclusion is best supported by the information in the chart?
A. Material W is less absorbent than material Z.
B. Material Y is the least reflective.
C. Material X is more reflective than material W.
D. Material Z is the least absorbent.
Answer (2)
The conclusion best supported by the data is that Material W is less absorbent than Material Z, as indicated by their respective temperatures of 87°F and 105°F. This reflects that a higher temperature suggests greater heat absorption. The correct option is A.
;
The problem provides temperatures of four materials under a heat lamp.
We analyze each conclusion based on the relationship between temperature and heat absorption/reflection.
Higher temperature indicates more heat absorption, and lower temperature indicates more reflection.
The best-supported conclusion is: Material W is less absorbent than material Z. M a t er ia l Wi s l ess ab sor b e n tt hanma t er ia lZ
Explanation
Understanding the Problem We are given the temperatures of four materials after being placed under a heat lamp. The material with the highest temperature absorbed the most heat, and the material with the lowest temperature absorbed the least heat (or reflected the most). We need to determine which conclusion is best supported by the data.
Listing the Temperatures The temperatures of the materials are: Material W: 87°F, Material X: 99°F, Material Y: 75°F, Material Z: 105°F.
Analyzing the Conclusions Let's analyze each conclusion:
Material W is less absorbent than material Z: Material W has a temperature of 87°F, and Material Z has a temperature of 105°F. Since Z has a higher temperature, it absorbed more heat, meaning W is indeed less absorbent than Z. This statement is supported by the data.
Material Y is the least reflective: Material Y has the lowest temperature (75°F), which means it absorbed the least heat. Absorbing the least heat means it reflected the most, not the least. This statement is incorrect.
Material X is more reflective than material W: Material X has a temperature of 99°F, and Material W has a temperature of 87°F. Since X has a higher temperature, it absorbed more heat and is therefore less reflective than W. This statement is incorrect.
Material Z is the least absorbent: Material Z has the highest temperature (105°F), meaning it absorbed the most heat. Therefore, it is the most absorbent, not the least. This statement is incorrect.
Final Answer The conclusion that is best supported by the information in the chart is that Material W is less absorbent than material Z.
Examples
Understanding heat absorption and reflection is crucial in many real-world applications. For example, choosing the right color for your clothes on a sunny day can make a big difference in how cool you feel. Lighter colors reflect more sunlight and keep you cooler, while darker colors absorb more heat and can make you feel hotter. Similarly, architects use materials with different absorption and reflection properties to design buildings that are energy-efficient, keeping them cool in the summer and warm in the winter. This principle is also applied in solar panel technology, where materials are chosen to maximize heat absorption from the sun to generate electricity.
